Implement grapher and notebook to test it

trees/Stree_grapher.py

@@ -16,14 +16,21 @@ from trees.Snode_graph import Snode_graph
 from trees.Stree import Stree
 from trees.Siterator import Siterator
 
+
 class Stree_grapher(Stree):
+    """Build 3d graphs of any dataset, if it's more than 3 features PCA shall
+    make its magic
+    """
+
     def __init__(self, params: dict):
         self._plot_size = (8, 8)
         self._tree_gr = None
         # make Snode store X's
         os.environ['TESTING'] = '1'
+        self._fitted = False
+        self._pca = None
         super().__init__(**params)
-        
+
     def __del__(self):
         try:
             os.environ.pop('TESTING')
@@ -43,12 +50,52 @@ class Stree_grapher(Stree):
         return mirror
 
     def fit(self, X: np.array, y: np.array) -> Stree:
+        """Fit the Stree and copy the tree in a Snode_graph tree
+
+        :param X: Dataset
+        :type X: np.array
+        :param y: Labels
+        :type y: np.array
+        :return: Stree model
+        :rtype: Stree
+        """
         if X.shape[1] != 3:
-            pca = PCA(n_components=3)
-            X = pca.fit_transform(X)
+            self._pca = PCA(n_components=3)
+            X = self._pca.fit_transform(X)
         res = super().fit(X, y)
         self._tree_gr = self._copy_tree(self._tree)
+        self._fitted = True
         return res
 
+    def score(self, X: np.array, y: np.array) -> float:
+        self._check_fitted()
+        if X.shape[1] != 3:
+            X = self._pca.transform(X)
+        return super().score(X, y)
+
+    def _check_fitted(self):
+        if not self._fitted:
+            raise Exception('Have to fit the grapher first!')
+
+    def save_all(self, save_folder: str = './', save_prefix: str = ''):
+        """Save all the node plots in png format, each with a sequence number
+
+        :param save_folder: folder where the plots are saved, defaults to './'
+        :type save_folder: str, optional
+        """
+        self._check_fitted()
+        seq = 1
+        for node in self:
+            node.save_hyperplane(save_folder=save_folder,
+                                 save_prefix=save_prefix, save_seq=seq)
+            seq += 1
+
+    def plot_all(self):
+        """Plots all the nodes
+        """
+        self._check_fitted()
+        for node in self:
+            node.plot_hyperplane()
+
     def __iter__(self):
         return Siterator(self._tree_gr)